Process of treating albumenous animal waste



PATENT @FFHCCE.

PAUL HILDEBRANDT, OF HAMBURG. GERMANY, ASSIGNOR, BY MES NE ASSIGNMENTS,-TO THE CHEMICAL FOUNDATION, INC., A CORPORATION OF DELAWARE.

PROCESS OF TREATING ALBUMENOUS ANIMAL WASTE.

No Drawing.

. '1 '0 all whom it may concern:

Be it known that I, PAUL HILDEBRANDT, citizen of the Empire of Germany,residing at Hamburg, Germany, have invented new a and usefulImprovements in a Process of Treating Albumenous Animal \Vaste, of whichthe following is a specification.

It is known that albumenoid matterv is converted into the soluble stateby boiling with acid'liquors. Heretofore that reaction has been mainlyapplied to casein-products, which were either in the wet or dry state.

The conversion of albumenous animal waste into soluble albumen oralbumenoid products by boiling with acid liquors has never been appliedfor practical purposes, because that conversion can only be carried outwith profit by taking special precautions. If the boiling with acidliquors be applied to waste meat, the result is altogetherunsatisfactory, because glue-like products are formed, containing greatquantities of water and which are altogether unsuitable for human foodpreparations.

I have now found, that the drawback mentioned can be overcome by the useof definite quantities of water in combination with the gradual additionof the waste meat, so that fresh quantities of waste meat are not addedto the acid liquor until the former quantity of meat has been dissolved.One may also take from the very beginning very large quantities of waterand proceed as usual. The quantity of water must at least amount toseveral times that of the dry albumen contained in the waste meat.

In this wayso-luble albumen preparations suitable for human food can beobtained by neutralizing and boiling down the acid solutions, preferablyin vacuo. These extracts resemble the well known Liebigs-meat-ex tractsof the trade, and sometimes even surass them in palatability. Theinvention t erefore consists 'in the preparation of meat- Applicationfiled December 26, 1917. Serial No. 208,862.

extract like preparations from animal waste. It is not necessary to usewaste meat as a raw material for the meat-extract preparations, but suchalbumenoid matter, like cartilage, sinews, horn, hair, skins and thelike can be used with perfect success, which have hitherto never beenapplied for human food. I consider the utlllzatlon of the products forhumaufood preparations as a great progress in theart.

The success of the process also depends to a-.certain degree upon theconcentration of the acid liquor. If strong acid'be taken the time ofboiling is reduced, whereas for weak acid along continued boilingbecomes necessary, for bringing the albumen into solution. The time fortreatment may also be reduced by boiling the mass with the acid liquorunder'increased presure. 5

lVhat I claim is 1. In the herein described process of treatingalbumenous animal matter, the step which consists in successivelyintroducing quantities of such matter into boiling acid liquors, eachquantity of matter being permitted to dissolve before introducing the

